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HID: ntrig: fix touch events 

This reinstates the lost unpressing of BTN_TOUCH.  To prevent undesireably
touch toggles this also deals with tip switch events.

Added a trap to prevent going out of bounds for hidinputs with empty reports.

Clear bits of unused buttons which result in misidentification.

Signed-off-by: Rafi Rubin <rafi@seas.upenn.edu>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Rafi Rubin 2010-03-10 16:10:28 +01:00 committed by Jiri Kosina
parent eff7f270e9
commit 2886539d5e
1 changed files with 11 additions and 0 deletions
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11
drivers/hid/hid-ntrig.c
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@ -140,6 +140,9 @@ static int ntrig_event (struct hid_device *hid, struct hid_field *field,
nd->reading_mt = 1;
nd->first_contact_confidence = 0;
break;
case HID_DG_TIPSWITCH:
/* Prevent emission of touch until validated */
return 1;
case HID_DG_CONFIDENCE:
nd->confidence = value;
break;
@ -259,6 +262,7 @@ static int ntrig_event (struct hid_device *hid, struct hid_field *field,
BTN_TOOL_TRIPLETAP, 0);
input_report_key(input,
BTN_TOOL_QUADTAP, 0);
input_report_key(input, BTN_TOUCH, 0);
}
break;
@ -308,13 +312,20 @@ static int ntrig_probe(struct hid_device *hdev, const struct hid_device_id *id)
list_for_each_entry(hidinput, &hdev->inputs, list) {
if (hidinput->report->maxfield < 1)
continue;
input = hidinput->input;
switch (hidinput->report->field[0]->application) {
case HID_DG_PEN:
input->name = "N-Trig Pen";
break;
case HID_DG_TOUCHSCREEN:
/* These keys are redundant for fingers, clear them
* to prevent incorrect identification */
__clear_bit(BTN_TOOL_PEN, input->keybit);
__clear_bit(BTN_TOOL_FINGER, input->keybit);
__clear_bit(BTN_0, input->keybit);
/*
* A little something special to enable
* two and three finger taps.